Just a sensible strategy would be a good starting point.
Like you say, they’ve know for over 20 years about the requirements for investment in nuclear energy and failed to do anything. In a similar way, we have virtually no ability to store gas which seems very short sighted, and the retail side of supply is a mess.
Its going to take some sorting out but I think we need to have a complete rethink about becoming self sufficient as a nation, at least for ‘essential services’ such as water, transport, power, essential chemicals…